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i 819 Striker Avenue,Suite 8 <br /> Sequoia Sacramento,CA 95834 <br /> (916)921-9600 <br /> ` Ana lytic a y FAX(916)92i-0100 <br /> AnaL Cl 11 www.sequoialabs.com <br /> ' 4 <br /> SECOR International-Rancho Cordova Project: ARCO 434,Lodi,CA ! Sampled: 9/5/00 <br /> 3017 Kilgore Road,Suite 100 Project Number: N/A I Received: 9/6100 <br /> Rancho Cordova,CA 95670 Project Manager: Rusty Benkosky Reported: 9/20/00 <br /> MTBE by EPA Method 8260A/Qualit,}Control <br /> Sequoia Analytical-Sacramenfb <br /> Date Spike Sample QC ' Reporting Limit Recov. RPD RPD <br /> Analyte Analyzed Level Result Result Units Recov.Limits % Limit % Notes* <br /> Batch: 0090164 Date Prepared: 9/18100 Extraction Method: EPA 5030B IP/Tl <br /> Blank 0090164-BLKI <br /> Methyl tent-butyl ether 9/18/00 ND ug/t 2.00 <br /> Surrogate: 1,2-DCA-d4 50.0 47.4 60.0-140 94.8 <br /> I <br /> LCS 0090164-BS1 <br /> Methyl tert-butyl ether 9/18/00 50.0 49.8 ug/i 60.0-140 99.6 <br /> Surrogate: 1,2-DCA-d4 50.0 47.8 60.0-140 95.6 <br /> i <br /> LCS Dun 0090164-BSD1 <br /> Methyl tert-butyl ether 9/18/00 50.0 49.2 ug/1 60.0-140 98.4 25.0 1.21 <br /> Surrogate: 1,2-DCA-d4 50.0 47.8 60.0-140 95.6 <br /> I Extraction Method: EPA 5030B IP/TI Batch: 0090165 Date Prepared: 9/19/00 <br /> � T <br /> Blank 0090165-BLKI <br /> Methyl tert-butyl ether 9/19/00 ND ug/l 2.00 <br /> Surrogate: 1,2-DCA-d4 50.0 44.4 60.0-140 88.8 <br /> LCS 0090165-BSI <br /> Methyl tert-butyl ether 9/19/00 50.0 52.0 ug/1 60.0-140 104 <br /> Surrogate: 1,2-DCA-d4 50.0 46.8 60.0-140 93.6 <br /> LCS Dup 0090165-BSDI j <br /> Methyl tert-butyl ether 9/19/00 50.0 49.2 ug/l 60.0-140 98.4 25.0 5.53 <br /> Surrogate: 1,2-DCA-d4 50.0 47.4 60.0-140 94.8 <br /> 1 <br /> I <br /> i <br /> i <br /> i <br /> I <br /> i <br /> Sequoia Analytical-Sacramento *Refer to end of report for text of notes and definitions. <br /> Page 9 of I 1 <br /> 1 <br /> i � I <br />